Actually, not at all true. The organisms of the Cambrian look little like modern animals. It is only the major phyla that are recognized by the derived characteristics. For example, the cordates first arise in the early Cambrian, along with primitive inverebrates. You can safely say that no animal living today looks much like any living then. For example, there were no amphibians, no reptiles, no insects, no birds, and of course, no mammals.   Your shotgun approach isn't actually worth answering in any detail. It isn't even your work.
Label: Non-Sarcastic